LG LAC2900N Service Manual page 20

5B
CD no sound?
YES
Checked the
DSP signal out?
YES
OK
5C
No ejected the CD?
YES
Checked the
Eject key?
YES
Checked the Loading
Motor Control?
YES
OK
NO
NO
NO
Fig 3,4
2-13
IC503(140,141)
IC402(54)
CN520(19,21)